Originally posted by Azzy The lens has SR suffix on them, so Pentax is moving away from IBIS for FF ?
It could be that the added mass of a fullframe sensor prevents SR from fully compensating the shake. But the APS-C lens patent also mentions SR, I would not expect that to be the case.
Anyway, who knows what Ricoh will do next? Maybe they will move to in-lens stabilisation and that may even be the reason they have not yet updated the DA* lenses. You can't really tell from these patents though, because they are just patents.